I think I understand the reasoning there, especially for the other categories, where the bulk of content fits a fairly specific mold, like a single match or game.
For guides or educational material, I don't think it makes great sense to limit the diversity of the field. To clarify, I'm speaking of a pretty narrow band of content: material of finite length that, start to finish, happens to span more than a single YouTube link. An ongoing twitch stream wouldn't count, nor would most data pack review series - unless someone came out with an unusually influential or insightful pack review, which hasn't really happened IMO. To the community highlighting end, it'd probably be sufficient to select the first segment to stand in for the whole, but insofar as this might be an award for excellence in Netrunner broadcasting then I think there should be an option to highlight a longer work.
Maybe y'all have a good core model for most of those categories, but best educational content and commentary could be split off to more of a prestigious community spotlight? You mentioned "curation," but that's probably best done by a group of curators, and not by the nomination or popular vote processes.